... hole. Name:Perforated hole mesh, Perforated metal mesh,perforated sheet,Perforated mesh, Perforated, Perforated wire mesh, perforated metal, perforated steel ... objects, walls, generator room, factory buildings, and other noise sound source acoustic noise with sound-absorbing ... plate for building stairs, balconies, environmental tables and chairs, the shield can be used for machinery and equipment the ...